https://bugzilla.wikimedia.org/show_bug.cgi?id=49143

--- Comment #5 from Gabriel Wicke <[email protected]> ---
Just a clarification for those that have not been following the discussions in
the last year or so:

* We plan to store fully expanded snapshots of HTML for each revision. This
makes HTML retrieval fast, but also lets us provide a view of the page as it
looked like in the past including all transclusion/extension/file dependencies.
There are some storage volume trade-offs (which can likely be addressed with
compression), but if we decide to store a snapshot on each re-render after a
template/file change, we can provide a copy of each page at any point in the
past. Retrieving 'yesterday's Main Page' becomes possible. So far that has only
been possible with the flagged revision extension at considerable expense.

* Other data structures that change with transclusion/extension/file updates
will be snapshotted similarly. This applies to dynamic page properties for
example.

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